Re: RFA: Add ! LDBL_EQ_DBL implementations of cosl, sinl and tanl

[Gregory Pietsch <gpietsch at comcast dot net>]

On 3/3/2015 11:48 AM, Craig Howland wrote:
> On 03/03/2015 09:45 AM, Gregory Pietsch wrote:
> > Here's my attempt at all of the functions in the background of this. 
> > Feel free to criticize and carve it up like a Thanksgiving turkey. -- 
> > Gregory
> In a quick look at it, I don't see where the _Classify function 
> properly handles the Intel 80-bit long double format, which has the 
> fixed msb set in the significand--which needs to be ignored in the 
> INF/NAN check.  If it does, could you point it out to me?
I knew there was something wrong with that. Thanks for pointing that 
out! A correction is attached.
> By the way, I have almost all of the long double functions done, but 
> am still probably a couple of weeks away from getting the last details 
> done to be able to submit the first piece.  The strtold that I 
> mentioned a couple of weeks ago is the first I am working towards, but 
> it requires some infrastructure that I have to resolve, and time to 
> work on it has been hard to come by.  Once I get that, I'm planning on 
> putting in strtold.  After that there's lots more.  The stuff I have 
> has been tested with Intel 80-bit (the biggest nuisance because of 
> that p0 bit), as well as 128-bit on SPARC.  Of course, if others get 
> there first, that's OK, since I have been very pokey on it.

I think it's fun to compare implementations. I've gotten just about 
everything written that doesn't require a polynomial approximation in my 
implementation of the math library. Maybe we'll get better at it. -- Gregory
> Craig

Attachment: fpclassify.c
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